Thank you for the tips! I really think I'm dealing with something other than the shellac. At first there was this stuff that could be scraped off dry. Now it's like it's bulletproof. Nothing comes off on rags, and it just barely, barely comes off with the dremel brush and oil. I think someone put laquer over the decals, but I could be wrong. If that's what this is, then I may just leave it like it is and move forward.